Carbureter.



L. ANDERSON.

GARBURETER. APPLICATION FILED MAY 21 1910.

Patented July 4, 1911.

COLUMBIA PLANOURAPH co., WASHINGTON, D. c

LABS ANDERSON, OF CHICAGO, ILLINOIS.

CARBURETER.

Specification of Letters Patent.

Patented July 4, 1911.

Original application filed October 15, 1909, Serial No. 522,710. Divided and this application filed May 21, 1910. Serial No. 562,619.

lb all whom it may concern:

Be it known that I, LABS ANDERSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

The object of this invention is to provide an improved float-controlled hydrocarbon inlet valve for carbureters, and particularly for such carbureters as are intended for use upon automobile engines.

In the accompanying drawings, Figure 1 is a vertical central section through a carburetor embodying the features of my invention. Fig. 2 is a sectional View taken through the casing in the plane of dotted line 2 2 of Fig. 1. Fig. 3 is a detail view of certain parts, viewed as indicated by the arrows 3 in Fig. 2. Fig. 4 is a section on line 4 4: of Fig. 1.

The carbureter to which I have shown my improvement as applied comprises a casing having therein a float chamber 1 and a mix ing chamber 2, the latter being arranged for communication at 3 with the intake pipe (not shown) of an internal-combustion engine or other apparatus.

4 is a hydrocarbon nozzle communicating with the float chamber 1, said nozzle being located approximately centrally of the carbureter. 5 is a valve controlling said nozzle, 6 an air inlet alined with the hydrocarbon nozzle 4 and the outlet 3, and 7 a valved air inlet affording an additional supply of air.

Means is provided for admitting hydrocarbon to the lower part of the float chamber 1, which means, in this instance, is constructed as follows: Upon the lower end of the casing is formed an annular flange 8 which is externally screw-threaded to receive a gland 9. Within the annular flange 8 is a disk 10 having a peripheral flange 11, said disk lying in contact with a shoulder 12 formed upon the flange 8. The contacting surfaces of the shoulder 12 and the disk 10 are beveled, as shown in Fig. 1, so that a tight joint may readily be formed between said parts. Upon the lower edge of the flange 11 is an annular outwardly-extending flange 13 arranged to underlie the edge of the flange 8. To assist in correctly positioning the disk 10 within the flange 8, said flange has formed thereon two diametrically opposite lugs 14 adapted to enter notches 15 in the flange 13.

16 is an annular member having an annular rib 17 adapted to contact the lower edge of the annular flange 11, the contacting surfaces of the flange and rib being rounded to form a fluid-tight joint. The disk 10 is held in close contact with the annular shoulder 12 and the annular member 16 is held tightly against the annular flange 11 by the gland 9, the annular inturned flange 18 of which gland underlies the annular member 16.

19 is a strainer supported in any suitable manner by the member 16.

To the member 16 is attached a means for coupling a hydrocarbon supply pipe to the carbureter and a means for draining the float chamber. As herein shown, a central tubular stem 20 is formed integral with the member 16 and with a drain valve casing 21. Upon one end of the valve casing 21 is a screw-threaded nippel 22 communicating with the tubular stem 20' through the passages 23 24. The hydrocarbon supply pipe 25, in this instance, is attached to the nipple 22 by means of a gland 26 and a taper sleeve 27. WVithin the tapering chamber 28 of the drain valve casing is rotatably mounted a tapered valve plug 29 having ports 30 and 31 communicating with the passage 23. When it is desired to drain the carbureter, the valve plug 29 may be turned to place the port 31 in register with the outlet 32. A spring 33 holds the valve plug in fluid-tight contact with the walls of the chamber 28.

34. is an arm by means of which the valve plug may be rotated. When the arm 3 L is in the position which it tends to assume by the action of gravity the outlet 32 is closed.

The disk 10 has therein a port 35, said port in this instance being located at one side of the center of the disk. As herein shown, the port 35 has tapering walls which converge toward the upper end of the port, the upper edge of said walls forming a valve seat. In order that said valve seat may be formed of hard metal, the port may be formed in a separate piece fixed in an open ing in the disk 10.

The port 35 is controlled by a valve member 36. Said valve member, in the present embodiment of the invention, has a tapering point adapted to be seated upon the upper edge of the port walls. The valve member 36 is arranged to be moved through the medium of a float consisting, in this instance, of two sections 37, said sections being fixed to two branching arms 38 formed integral with two upright members 39 connected together by the cross-bar 40. The upright members 39 are connected to two posts 41 rising from the disk 10, by means of two links 42 42 of equal length. links have elongated hubs 43 to receive pivots 44 and 45 fixed in the members 39 and the posts 41. The distance between the pivots 44 is substantially the same as that between the pivot-s 45, therefore it will be understood that the links 42 are substantially parallel in all positions assumed by them, and that the float has a substantially vertical movement. The upper portion of the valve member 36 is pivoted in a fork 46 constituting an extension of the upper link 42 at one side of the pivot 45 for said link.

Upon the lower link 42 is formed a stop 47 to limit the upward movement of the valve member 36, the point of said'valve member never leaving the port 35, thereby insuring that the valve member shall always be in proper relation to the port. YVhen the float rises, the valve 36 is'lowered toreduce or cut off the inflow of hydrocarbon. It will be understood that the pivotal bearings in the system of levers connecting the float with the valve should be somewhat loose, so that they may operate freely. Any tendency to undue play or longitudinal displacement is ob viated by the elongated hubs 43.

As hereinbefore stated, thehydrocarbon nozzle 4 is located approximately centrally of the carbureter, hence the relation between the hydrocarbon nozzle and the level of the fuel is practically unaffected by such tilting of the engine as occurs when the car is traversing grades or rough roads. The float sections 37 likewise beingarranged substantially centrally of the carbureter, and being compelled by the parallel links 42 to move vertically in a substantially straight line as the level of the hydrocarbon varies, the extent to which they are submerged is practically the same whichever way the car- I bureter is tilted, hence their buoyancy is substantially unaflected by tilting of the car bureter, and the extent of movement of the float is always commensurate with the changes in the level .of the fluidr Consequently the regulation of the inflow through the port 35 is accurate and reliable.

I would have it understood that the invention is not limited to the precise details herein described, for various modifications will occur to persons skilled in the art.

Certain features of the carbureter herein illustrated are claimed in my copending ap- Said.

plicat-ions Serial Nos. 522,710 and 562,618, filed October 15, 1909, and May 21, 1910, respectively.

I claim as my invention:

1. The combination of a float chamber having a bottom inlet; a valve controlling the entrance of fluid into said chamber through said inlet; a float within said chamber; a support in the lower part of said chamber; two parallel links connecting the float to the support for rectilinear movement; and a connection between one of the links and the valve for operating the latter.

2. The combination of a float chamber; a valve controlling the entrance of fluid into said chamber; a float within said chamber; a support in the lower portion of said chamber; an arm attached to said float; two parallel links pivotally connected at their ends to said arm and said support; and a connection between one of said links and the valve for operating the latter.

3. The combination of a float chamber; a valve controlling the entrance of fluid into said chamber; a float within said chamber; two supports within the lower portion of said chamber; a member attached to said float; pivot pins fixed in said member and in said supports, the distance between the pivot pins carried by said member being substantially the same as the distance between the pivot pins of said supports; and two links of equal length having elongated hubs which are freely pivoted upon said pivots, one of said links being extended beyond its pivot in said supports, said valve being connected to the extension of said link.

4. The combination of a casing having an annular flange at its lower end; a disk having an annular flange fitted within said first mentioned flange, said disk having an inlet port therein; a member arranged to bear against the annular flange on said disk; a gland turned upon the first mentioned flange and bearing upon said member; and means attached to said member for connecting a supply pipe thereto.

5. The combination of a float chamber having an opening in its lower end; a member closing said opening and having an inlet port therein; a second member directly below said first mentioned member; means on the second mentioned member for connecting a supply pipe in communication with the lower end of the inlet port; a single means for securing said members to said float chamber; and a float-controlled valve operatively supported by the first mentioned member in position to control said inlet port 6. The combination of a float chamber having an opening in its lower end; a disk closing said opening, said disk having an inlet port therein; means for connecting a supply pipe in communication with the lower end of said inlet port; a support on said disk; a float in said chamber; parallel links connecting said float to said support for rectilinear movement; and a valve connected to one of said links and arranged to control said inlet port.

7. The combination of a casing having an annular flange at its lower end; a disk having an annular flange fitted within said first mentioned flange; said disk having an inlet port therein; an annular member arranged to bear against the annular flange on said disk; a gland turned upon the first mentioned flange and bearing upon the annular member; a strainer carried by the annular member and a supply pipe attached to said member.

8. The combination of a float chamber having an opening through its lower end; a disk closing said opening said disk having an inlet port therein; a lug rising from said disk and arranged substantially centrally thereof; a float within said chamber; an arm-like member to the upper part of which said float is secured; two parallel links connecting the lower part of said arm-like member to said lug; a valve member for controlling said port; and means at the side of said lug opposite to said links for connecting said valve member to one of said links.

9. The combination of a float chamber having an opening in its lower end; a disk closing said opening; a float valve carried by said disk; a member secured beneath the disk; and a drain valve and pipe-attaching means carried by said member.

10. The combination of a float chamber having a bottom inlet; a valve controlling the entrance of fluid into said chamber through said inlet; a float comprising tWo sections; two branching arms each attached to one of said sections and extending downwardly therefrom and connected rigidly together at their lower ends; a support in the lower part of said chamber; an upper and a lower link, said links being parallel and connecting the lower ends of said arms to said support; and a connection between one of said links and said valve for operating the latter. LABS ANDERSON. Witnesses:

J. RAYMOND BARsE, GEORGE L. CHINDAHL.

Copies of this patent may be obtained for fivecents each, by addressing the Commissioner of Patents. Washington, D. C. 

